With XInput2 it's possible that multiple pairs of keyboard and pointers
are connected. As the lock screen only grabbed keyboard and pointer using
the core protocol any additional input devices were still reporting
input events to non-lockscreen windows creating the risk of interaction
with the system and accidentially typing a password where it doesn't
belong.
This change ensures that all additional master devices are also grabbed.
Unfortunately there are no xcb bindings for xinput2 (considered
experimental and thus not build on at least all debian based distros)
and because of that the XLib library is used. This brings some problems
as we cannot process the events (for that we would need xcb bindings,
to get the events). To still be able to get any keyboard and mouse events
we grab using the core protocol as it used to be and then ignore the
"Virtual core" devices and don't grab them with XInput2. Input events
from additional devices are grabbed and ignored, but definately no longer
delivered to other windows.
BUG: 341469
FIXED-IN: 5.3.0
REVIEW: 122558
Only drkonqi and systemmonitor depend on it.
(systemmonitor uses libksysguard's processui lib, which is not installed
by libksysguard if webkit is not found)
REVIEW: 121718
The screenlocker_greet needs to tell the parent ksld process which
windows it created. Ksld sends input events to these windows. So
far this was based on an X property on the window. Unfortunately
ksld didn't validate whether the windows tagged with this property
belong to the screenlocker_greet process it started.
With this change the communication for announcing windows is moved
away from the X11 protocol and instead a custom Wayland protocol is
used.
Ksld starts a KWaylandServer when the greet process gets started. It
creates anonymous unix sockets for the connection and passes one
filedescriptor to the started greeter process.
The check for the X property is removed in ksld and instead only
windows ids passed through the Wayland socket connection are
accepted.
REVIEW: 121429
Instead of keeping the state, expect the code to follow the order it's
expected from it.
Bumps kf5 requirement to 5.4 (i.e. master as of today).
REVIEW: 121244
Martin Gräßlin
Jonathan Riddell
Montel Laurent
Eike Hein
Aleix Pol
Kai Uwe Broulik
David Edmundson
Marco Martin
Martin Klapetek
Hrvoje Senjan
Bhushan Shah
David Faure
Dan Vrátil
Aaron Seigo
Bernd Steinhauser
Michael Palimaka
Vishesh Handa